The club have confirmed they are in talks with an unnamed group of potential investors.
Speculation has been mounting since the weekend that the Elland Road club could be the subject of a possible takeover, while it is understood discussions took place in Leeds last week.
A club statement read: "Further to media reports on Tuesday morning, the club can confirm that talks are taking place regarding investment for the long-term future."
It continued: "The club has always publicly stated that it would welcome potential investment, but has maintained a belief whereby the quality of the investor is the most important factor in terms of the long-term development of Leeds United.
"No further comment will be made at this stage."
Canada-based Maple Leaf Sports and Entertainment (MLSE), owners of NHL ice hockey franchise Toronto Maple Leafs, have been mentioned on internet fans' forums, but it has been reported the company denied any involvement in last week's meetings.